import numpy as np

def get():
    s = ["a","b"]
    print(s)
    for x in s:
        print(x)

def get1():
    s = np.array([["1","2"], ["3","4"]])
    for i in s:
        for j in i:
            print(j)
        print(i)

if __name__ == "__main__":
    get()
    get1()